topic Re: pocket bug in Fusion Manufacture Forum

pocket bug

friesendrywall — Mon, 04 Jul 2016 15:50:52 GMT

See 2d adaptive4, as see if you can generate some sort of cam for this, nothing so far has worked here, I don't know if F360 doesn't like the imported stp or what.

Re: pocket bug

HughesTooling — Mon, 04 Jul 2016 16:17:53 GMT

Got it to work, see attached file. Not sure what your stock is, this shows some collisions on plunges with the stock you have set in the setup.

Mark

Re: pocket bug

HughesTooling — Mon, 04 Jul 2016 16:24:05 GMT

This selection works as well but the blue shading looks wrong.

Mark

Re: pocket bug

friesendrywall — Mon, 04 Jul 2016 16:35:01 GMT

Video?

You don't see the internal cam error?

Re: pocket bug

HughesTooling — Mon, 04 Jul 2016 17:06:52 GMT

What error, I get this.

Mark

Re: pocket bug

Steinwerks — Mon, 04 Jul 2016 17:40:46 GMT

This is probably my favorite. Reducing the minimum radius and stepover:

If I were going to go further I'd increase the stay down distance to something like 6" and the amount to 90%. I have found that unless your machine has great rapid acceleration (IE a small Matsuura, Brother or Robodrill) it's almost always faster to stay down unless you're hopping over the part, and increase the high feedrate to the maximum of the machine.

Re: pocket bug

friesendrywall — Mon, 04 Jul 2016 19:04:25 GMT

Re: pocket bug

HughesTooling — Mon, 04 Jul 2016 19:59:50 GMT

Can you export the file in that state and attach here.

Thanks Mark

Re: pocket bug

friesendrywall — Mon, 04 Jul 2016 20:15:22 GMT

I already did. If I open the file I exported, it is in that state already.

Re: pocket bug

HughesTooling — Mon, 04 Jul 2016 21:05:32 GMT

The reason your original file from the fist post give an error is because your contour selection is wrong. Did you examine the files from me and @Steinwerks?

Here's a screencast to give you a bit better idea how to make selections for clearing. When you make the selections make sure the red arrows are on the side you want to remove.

Mark

Re: pocket bug

friesendrywall — Mon, 04 Jul 2016 21:17:05 GMT

Thank you for the video, I can recreate what you did here.

I didn't examine the files, after all its getting there that matters. Apparently there are some unwritten rules about selection that I am not understanding. Apparently the cam doesn't like the lower parts of the pockets selected.

Since Fusion 360 really doesn't have a manual, I think there could be more put into video's, video's indexes, and old pages, there are quite a few old pages and links in the Fusion 360 ecosystem that are 404's.

Are you sure that the imported files aren't causing issues in some way that a native file wouldn't?

Re: pocket bug

HughesTooling — Mon, 04 Jul 2016 22:20:27 GMT

Face selection like you used has been unreliable with native Fusion designs and imported files, edge selection is more reliable. Edge selection for pockets is quite obvious but when you are clearing a core like your example it's not so obvious.

For example, selecting a closed pocket with islands you'd select like this.

For clearing, the outer profile is selected as the stock contour, like this.

Mark

Re: pocket bug

Steinwerks — Mon, 04 Jul 2016 22:40:21 GMT

Honestly Pocket Selection is a TERRIBLE way to define this toolpath's geometry selection, especially given that there are so many folks using this software who are unfamiliar with CAM coming into it for the first time. I wish the Fusion and InvHSM teams had stuck with geometry definitions identical to HSMWorks because they make SO much sense. "Pocket Selection" does not.

My solution is exactly what I would do in HSMWorks/HSMXpress: select the chains you do NOT want to cut, and turn off "Machine Cavities" (except this has been REMOVED in Fusion, making this far less intuitive) so it cuts outside of those selections. Calling them "Pockets" just confuses the crap out of people.

Re: pocket bug

friesendrywall — Tue, 05 Jul 2016 11:51:36 GMT

Whether or not a person should select pockets, it is available after all, so it should work it seems to me.

Overall, I accept to a certain degree the limitations of fusion360, mostly because the cam engine is very good for the price. However, learning the undocumented mouse/UI driven interface is a little like learning a language without a book on language structure.

Re: pocket bug

Steinwerks — Tue, 05 Jul 2016 16:52:46 GMT

I'm not saying that the programmer shouldn't be allowed to, or even actually select pockets, just that titling the geometry selection "Pocket Selection" is extremely misleading.

Re: pocket bug

kb9ydn — Tue, 05 Jul 2016 17:03:10 GMT

@friesendrywall wrote:

Whether or not a person should select pockets, it is available after all, so it should work it seems to me.

Overall, I accept to a certain degree the limitations of fusion360, mostly because the cam engine is very good for the price. However, learning the undocumented mouse/UI driven interface is a little like learning a language without a book on language structure.

It's even more difficult when the language is incorrect, which is what Steinwerks was saying. It should not say "pocket selections", it should say "model selections". Because "pocket selections" implies that you are always selecting the pockets to machine, which is NOT TRUE when you are machining the outside of a core or boss. This may seem like a minor issue, but it is horribly confusing to people that are new to 2D geometry selection in Fusion. This REALLY REALLY REALLY needs to be fixed.

And yes, as was also mentioned face selection is not very reliable. This has been an issue for quite awhile and also needs to be fixed.

Re: pocket bug

kb9ydn — Tue, 05 Jul 2016 17:19:23 GMT

So I just posted about this in the CAM support forum. Hopefully the developers will notice.

http://forums.autodesk.com/t5/support/confusing-description-label-in-fusion/td-p/6419942